B cells resolve focal neutrophil inflammation in vivo. Related to Fig. 6. C57BL/6 or Ighm−/− mice were i.t. treated with zymosan-coated beads (106) or sterile PBS. Lung intravital microscopy was performed at 4 h and 24 h after stimulation, and neutrophil recruitment and B cell margination were assessed. Playback speed is 30 frames/s, 10 min actual imaging time per segment.